title: Confinement of a bioinspired nonheme Fe(II) complex in 2D hexagonal mesoporous silica with metal site isolation.
abstract: A mixed amine pyridine polydentate Fe(II) complex was covalently tethered in hexagonal mesoporous silica of the MCM-41 type. Metal site isolation was generated using adsorbed tetramethylammonium cations acting as a patterned silanol protecting mask and trimethylsilylazane as a capping agent. Then, the amine/pyridine ligand bearing a tethering triethoxysilane group was either grafted to such a pretreated silica surface prior to or after complexation to Fe(II). These two synthetic routes, denoted as two-step and one-step, respectively, were also applied to fumed silica for comparison, except that the silanol groups were capped after tethering the metal unit. The coordination of the targeted complex was monitored using UV-visible spectrophotometry and, according to XPS, the best control was achieved inside the channels of the mesoporous silica for the two-step route. For the solid prepared according to the one-step route, tethering of the complex occurred mainly at the entrance of the channel.
authors.affiliation: Institut de Chimie Moléculaire et des Matériaux d'Orsay, Laboratoire de Chimie Inorganique, Université Paris Sud, F-91405 Orsay Cedex, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Jollet
authors.forename: Belén
authors.initials: B
authors.lastname: Albela
authors.forename: Katell
authors.initials: K
authors.lastname: Sénéchal-David
authors.forename: Pascale
authors.initials: P
authors.lastname: Jégou
authors.forename: Emilie
authors.initials: E
authors.lastname: Kolodziej
authors.forename: Joëlle
authors.initials: J
authors.lastname: Sainton
authors.forename: Laurent
authors.initials: L
authors.lastname: Bonneviot
authors.forename: Frédéric
authors.initials: F
authors.lastname: Banse
mesh_terms: D000588:Amines / Q000737:chemistry; D040761:Biomimetic Materials / Q000138:chemical synthesis / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008024:Ligands; D053758:Nanoparticles / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000588:Amines; D008024:Ligands; D009942:Organometallic Compounds; D016877:Oxidants; D012822:Silicon Dioxide; D006861:Hydrogen Peroxide; D007501:Iron